staging: comedi: return void from comedi_driver_unregister()

'Unregister' functions generally return `void`.
`comedi_driver_unregister()` currently returns an `int` errno value.
Nothing looks at the return value.  Change the return type to `void`.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index ab27894..98058b9 100644 (file)
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -363,7 +363,7 @@ int comedi_auto_config(struct device *, struct comedi_driver *,
 void comedi_auto_unconfig(struct device *);
 
 int comedi_driver_register(struct comedi_driver *);
-int comedi_driver_unregister(struct comedi_driver *);
+void comedi_driver_unregister(struct comedi_driver *);
 
 /**
  * module_comedi_driver() - Helper macro for registering a comedi driver

diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index a15934f..ba5d6d9 100644 (file)
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -559,7 +559,7 @@ int comedi_driver_register(struct comedi_driver *driver)
 }
 EXPORT_SYMBOL_GPL(comedi_driver_register);
 
-int comedi_driver_unregister(struct comedi_driver *driver)
+void comedi_driver_unregister(struct comedi_driver *driver)
 {
        struct comedi_driver *prev;
        int i;
@@ -584,15 +584,14 @@ int comedi_driver_unregister(struct comedi_driver *driver)
 
        if (comedi_drivers == driver) {
                comedi_drivers = driver->next;
-               return 0;
+               return;
        }
 
        for (prev = comedi_drivers; prev->next; prev = prev->next) {
                if (prev->next == driver) {
                        prev->next = driver->next;
-                       return 0;
+                       return;
                }
        }
-       return -EINVAL;
 }
 EXPORT_SYMBOL_GPL(comedi_driver_unregister);